今天發現Scanner鍵盤錄入物件錄入不對應的型別的時候下面的Scanner錄入會一直使用上一步錄入錯誤時的值，導致程式錯誤

程式碼效果如下：

 1     public static void main(String[] args) {
 2         TreeMap<Student, String> treeMap = new TreeMap<>();
 3         ArrayList<Student> list = new ArrayList<>();
 4         ArrayList<String> list1 = new
 
 ArrayList<>();
 5         Scanner sc = new Scanner(System.in);
 6         while (list.size() < 3) {
 7             System.out.println("請輸入第" + (list.size() + 1) + "個學生的姓名：");
 8             String name = sc.next();
 9             int age = 0;
10             while (true) {
11                 try
 
 {
12                     System.out.println("請輸入第" + (list.size() + 1) + "個學生的年齡：");
13                     age = sc.nextInt();       //鍵盤錄入出錯位置
14                     break;
15                 } catch (Exception e) {
16                     System.out.println("請輸入整數！");
17                    // sc = new Scanner(System.in);        需要正確插入改正，幫sc重新開闢空間
 

18 
19                 }
20             }
21             Student student = new Student(name, age);
22             list.add(student);
23 
24 
25         }
26 
27         while (list1.size() < 3) {
28             System.out.println("請輸入第" + (list1.size() + 1) + "個學生的地址：");
29             String dress = sc.next();
30             list1.add(dress);
31 
32 
33         }
34         for (int i = 0; i < 3; i++) {
35             treeMap.put(list.get(i), list1.get(i));
36 
37 
38         }
39         Set<Map.Entry<Student, String>> entries = treeMap.entrySet();
40         entries.stream().filter(s -> s.getKey().getName().startsWith("張")).forEach(s -> {
41             System.out.print("學生資訊：");
42             System.out.print(s.getKey());
43             System.out.println(",對應的居住地址是：" + s.getValue());
44 
45 
46         });

錯誤效果如圖：

修改之後效果圖：